Carbureter.



PATBNTED APR. 9, 1907.

P. GAETH. GARBURBTER.

APPLIOATION FILED mm. 29. 1906.

2 SHEETS-SHEET 1.

/////z7////AW/////////" No. &49,538. PATENTED APR. 9, 1907.

' P. GABTH. V

CARBURETER.

APPLIOATION I'ILBD DEO. 29. 1906.

2 SHEETS-SHEET 2.

to %mwoo 314% z UNITED STATES PATE NT OFFICE.

PAUL GAETH, OF LEVELAND, OHIO.

CARBURETER.

Specificaton of Letters Patent.

Patents& a rile, 1907.

i Application filed December 29,1906. Serial No'. 349876.

Be it known that I, PAUL GAETH, a citizen of the United States, residing at Cleveland, in the County of Cuyahoga and State oi' Ohio, have i'vented new and useful Im rovenents in Carbureters, of which the fo lowing is a specification.

This. nvention relates to carbureters, and particularly to the means for controlling the supply of air and gasolene to the mixingchamber. l

i The object of the invention is to provide .means for so connecting the gasolene-valve -speeds an shown in which when the throttle is almost closed the infiowing air is confined to a central tube through which it must all enter, the

gasolene-ports discharging into said tube, so

that a perfect mixture is formed even at a y very low speed'.

The advantages will be further evident from the following description and the drawn s.

in the drawings, Figure 1 is a top plan view 'of the carbureter. Fig. 2 is a section on the line 2 2 of'Fig. 1, the throttle being closed. Fig. 3 is a similar view with the throttle open. 4 is a section on the line 4 4 of Fig. 2, the throttle-valve being removed.

Fig. 5 is a vertical sectional View of the throttle-valve removed, and Fig. 6- is a horizontal' section on the line 6 6 of Fig. 5. 4-5,

Fig. 7 is a section onthe line 7 7 of Fig. 1.

` l lteterring specifically to the drawings, 6

dicates the gasolene-supply and float-c'hamber of ordinary Construction, from which oil is 'supplied through a port 7 to a vertical\ tube 8,

which extends centrally through the throt-. tle-valve casing 9, This tube has a'reduced vvalve-seat 10, which may be openedor closed by a needle-valve 11, which is threaded into the tube 8 and, mav be adjusted up oi: down,

as desired. Above the valve 10 are p0rts-12, which open through the tube into another concentric tube '13, whiclris forme'd integrally with the 'casing 9 and which projects up within the throttle-valve and around the tube 8, at a slight distance therefrom. The air-inlet pipe is indicated at'14 and communicates with the bottom of the throttle-valve casing and with the tube 13. The bottom or floor 9 of the throttle-valvecasing has segnental openings therein, and these form air-inlets from the passage 14 during certain positions of the. throttle'. The outlet for the mixture to the engine is indicated at 16, leading laterally from the throttle-valve casing.

There isalso an auxiliary valve which opens into the side of the throttle-valve -asing. This auxili'ary valve is located at the mad of a pipe or h'ollow projection 17, exteding from the side of the casing and provided at the end with a plug IS, having openings 19, which are normally closed by a disk on the under side of the plug. This disk is held by a stem 21, which extends through the plug and has `above the same a coiled spring 22 between the top of the plug and a collar 23. The springinormally holds the valVe-disk 20 closed, `but under heavy 'suction at high speed the valve will open and let an auxiliary sup ly of air into the mix ing-chamber.

.he mixing-chamber s for-med or comprised within the cylindrical throttle-valve 24, which fits within the casing, and the top 25 thereof has a hole 26, through which the tube 8 extends, and the bottom 27 thereof;

has a central hole28, in which fits the tube 13. Said bottom is also provided with segmental openings 29, which are adapted to register With the openings 15 When the throttle is open. The wall 24 .of the throttle has a large opening 30, .which registers with the pipe 16 to the engine when the throttle `1S o en, and it also has a smaller opening 31,

Wnich registers with the pipe 17 leading from the auxiliary air-va'lveZO.

The throttle-valve is provided with an op:

erating-handle 32, whereby it maybe turned.

in its casing, and the needle-valve is held by a clamp 33, which is connectedto the handle of the throttle-valve by a pin at 34. By A ,loosening the screw 35 the needle-v'alve may,

.I OO

be adjusted in the clam' 'to vary itsrelation to its seat 10, but-when t ie screw is tightened the connectioncauses the needle to turn and i open or close' With. the .throttle. Consequently the wider the throttle is opened the ports 12 ihtotheconcentric tube 1.3.

'more the needle-valve is opened, so that the supply of gasolene is propcrtioned to the speed or Work.

The top of the throttle c arries a stop 36,"

which strikes a projection 37 on the casing when the-throttle is closed.

^ In operation whenthe throttle is open 'the gasoline'is 'supplied from the fioat-chamber through the passage 7, the valve 10, and Air is drawn in throughthe passage 14 and up* through the .tube 13 and thence out through the opening intoithe pipe 16, the explo 'sive miXture being :formed within the mixing-ehamber in-the 'valve. When the valve s'farly opened, the openings 29' in 'the bottom thereof also register with the cpenings pressure which decreases the power.

*drawn through the tube 13.

15 in the bottom of the valve-casing, allowing an additional supply of air to enter into the .miXing-chamber. Furthermore, under high speed air entersfinto the miXing-chamber through the valve 20 and opening 31.

When *running at low speed, with the throttle' almost closed, solid portions of the bottom of the lvalve ,lap the openings' 15, so that said openings 29 15 are closed, all the air being This flow of air directly over thegasolene-ports picks'upsufficient gasolene to make a perfect mixture, so

that a perfect mixture is obtained even at' very low speed& As the throttle is opened the openings 29 15 begin to register and supply additional air, which mixes With the vapor; Itshould be remembered that a's the throttlevalve is opened the needle-valve is also -grad-' uallyjopened, so that the gasolene supplied is n proportion to the speed or work. This is a decided advantage over those 'structures in whiclnthe gasolene-valveis not variabl'e, but remains -at the same opening for various speeds and which consequently have to depend on ncreased suction to carry up a proper amount of gasolene, and increased 'suction is objectionable for various reasons,

among which are that it throttles the motor and also tends to cause a vac'uum or back Furthermore, it is impossible for' the gasolenevalve to clog, because whenever the throttle is opened the needle-valve is'raised and the gasolene-passage s opened and any secliment v is 'drawn from the valve-seat, Whereasin carburetershaving a fixed gasolene-regulating valve sedment is drawn into the valve--seat Witnesses e screwed into said tube, the casing havingan air-inlet passage terminating in a pipe extending into the valve around said fuel-'ppe,

and also having additional air-inlet openings controlled by the valve. I

2. In a carbureter, n combnaton, 'a casing, a throttle-valve tnerem comprsng a 'hollow cylinder having' an outletopening in -the side and a'r-nlet openings n the bottom,

and a fuel-supply pipe extending through the bottom of the casing and into the valve, the

casing having an air-passage terminating in a' tube surrounding the fuel-pipe in the valve, said passage also communicating with the interior of the casing through openings in the bottom thereof 3.' In a carbureter, incombination, a casing having an air-inlet tube in the bottom thereof, and segmental air-inlet 'penings in the bottom'around said tube, a fuel-supply pipe opening into sai-d. tube, and a cylindri'cal throttle-valve having'a central opening in' the bottom through which said tube and pipe project and also having segmental openings in the bottom ada-pted to register with said air-inlet openings. u

4. In a carbureter, in combination, a cesinghaving an air-inlet tube projecting upwardly from the bottom thereof and air-inlet openings in the bottom outside said tube, a

cylindrical throttle-'valve in the casing, sur

rounding said tube and having openings in openings, a fuel-inlet pipe which extends up- 'Wardly through said tube and the top of the 'gvalve and has ports opening into the tube, and a fuel-r'egulating valve screwed into-the pipe and controlling said ports and connected. -at the top tcthe throttle-valve, to operate therewth. i

In testimony Whereof lhave signedmy name to this specification in the presence of two subscribing witnesses.

` PAUL -GAETL F. L. PIERGE, JOHN A. BoM IrARDT.

the bottom adaptedto register with said i IOO 

